Pupil performing titration

Pupil performing titration

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Credit: MARTYN F. CHILLMAID/SCIENCE PHOTO LIBRARY

Caption: MODEL RELEASED. Pupil performing titration. Schoolgirl dripping measured volumes of an acid from a burette (down right). The conical flask (lower right) contains a measured volume of an alkali and the indicator methyl red. As the acid & alkali mix they change the pH of the solution, resulting in a change in the indicator's colour. The yellow colour of the solution in the conical flask indicates that it has a pH above six, and is alkaline.

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Keywords: acid, apparatus, base, burette, chemical, chemicals, chemistry lesson, child, clamp stand, conical flask, equipment, experiment, female, girl, indicator, lab, laboratory, methyl red, neutralisation, neutralise, neutralising, neutralization, neutralize, neutralizing, ph, pupil, safety glasses, school, schoolchild, schoolgirl, science education, titration

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